Which of the following, if true, best reconciles the apparent discrepancy presented in the passage? A. Many climbers, lulled into a false sense of security, use the new equipment to attempt climbing feats of which they are not capable. B. Some mountain-climbing injuries are caused by unforeseeable weather conditions. C. Mountain climbing, although a dangerous sport, does not normally result in injury to the experienced climber. D. In the past ten years there have been improvements in mountain-climbing techniques as well as in mountain-climbing equipment. E. Although the rate of mountain-climbing injuries has increased, the rate of mountain-climbing deaths has not changed.